| Thermon Inc | EC | Renew by Nov 27, 2026 |
| Thor Enterprises LLC | EC | Active |
| Thurmon Construction Company | EC | Active |
| Tino A Bermudez Electrical LLC | EC | Active |
| Tipco A/C & Electrical, LLC | EC | Active |
| Tmco / Temperature Maintenance Co | EC | Active |
| TN - Skilite Electrical LLC | EC | Renew by Dec 12, 2026 |
| TNT Electrical Contractors | EC | Active |
| Tony The Electrician LLC | EC | Active |
| Top Branch Electric LLC | EC | Active |
| Top Electrical Solutions LLC | EC | Renew by Nov 12, 2026 |
| Torres Electrical Service | EC | Active |
| Total Energy Solutions Company, LLC | EC | Active |
| Totalenergies DG Texas Usa, LLC | EC | Active |
| Totality Electric 2024 | EC | Active |
| Trade Mark Electric | EC | Active |
| Traf-Tex, Inc | EC | Active |
| Transcore LP | EC | Renew by Dec 23, 2026 |
| Transnet Communications LLC | EC | Active |
| Trevino Electric | EC | Active |
| Tri Electric Company | EC | Active |
| Triangle Electric LLC | EC | Active |
| Trio Electric LLC | EC | Active |
| Trio Electric LTD | EC | Active |
| Trismart Solar LLC | EC | Renew by Dec 12, 2026 |
| Trizone Electric | EC | Renew by Nov 9, 2026 |
| Trugrid Us, LLC | EC | Active |
| Trust Electric | EC | Active |
| Trusted Electric | EC | Renew by Nov 18, 2026 |
| TS & V Controls LLC | EC | Active |
| Tu Legit Electric | EC | Active |
| Tune Up Electrical | EC | Active |
| Turner Power Systems & Contractor LLC | EC | Active |
| TX Power Electric LLC | EC | Active |
| Ty Young Elect & Instrument Contractors | EC | Active |
| Tyco Electrical Services Inc | EC | Renew by Nov 29, 2026 |
| Uhd Lighting & Electrical Design LLC | EC | Active |
| Ultralight Electric Incorporated | EC | Active |
| Ultron Electric LLC | EC | Active |
| Umana Electric | EC | Active |
| Un Electric Service | EC | Renew by Dec 28, 2026 |
| Unique Electrical Services | EC | Active |
| United CSH Corporation | EC | Renew by Dec 17, 2026 |
| United Electric | EC | Active |
| United Power And Control Systems LLC | EC | Active |
| Upi Builders LLC | EC | Active |
| Vaca Underground Utilities Inc | EC | Active |
| Vader Services LLC | EC | Active |
| Valo Electric Company | EC | Active |
| Vanin Electric | EC | Active |
| Varela American Electric Inc | EC | Active |
| Vera Power Services LLC | EC | Active |
| Vero Electrical Services | EC | Active |
| Versatech Automation Services | EC | Active |
| VG Electrical LLC | EC | Active |
| Vicast Electric | EC | Active |
| Vicon Electric | EC | Active |
| Villa3s Electric Company | EC | Active |
| Village Plumbing, Air And Electric | EC | Active |
| Villanueva Power Electric, LLC | EC | Active |
| Vol-Tek Electric LLC | EC | Active |
| Volt-Pro Electric | EC | Active |
| Volt-Pro Electric LLC | EC | Active |
| Voltage Electric LLC | EC | Active |
| Voltedge Electrical Solutions LLC | EC | Active |
| Voltex Electric | EC | Active |
| VR Electric, Inc | EC | Active |
| VR Electrical Services LLC | EC | Active |
| Vvid Electric | EC | Active |
| Walker J.G. Electric LLC | EC | Active |
| Warrior Electric Inc | EC | Active |
| Watts Electrical LLC | EC | Active |
| Wayne Electric Inc | EC | Active |
| Weathers Electric Company | EC | Active |
| West End Electrical Contractors LTD Co | EC | Active |
| Wheeler Electrical Services LLC | EC | Active |
| Who Conduit LLC | EC | Active |
| Willy Electric LLC | EC | Active |
| Wood Electrical Services, Inc | EC | Active |
| Wood Group Usa, Inc. | EC | Active |
| Woodlands Plumbing And Air | EC | Active |
| Worley Field Services Inc | EC | Active |
| WRC Electrical Services LLC | EC | Active |
| WVW Investments LLC DBA Starlight Solar | EC | Active |
| Y&B Solutions LLC | EC | Active |
| Yp Powerhouse LLC | EC | Active |
| Yy Electrical Services, LLC | EC | Active |
| Z Electrical LLC | EC | Active |
| Zadok Technologies Inc | EC | Active |
| Zebra Electric | EC | Active |
| Zema Electrical Services LLC | EC | Active |
| Zeus Electric LLC | EC | Active |
| ZH Electric | EC | Active |
| Zion Electrical Contractor | EC | Active |